package com.jie.reggie.filter;
import com.alibaba.fastjson.JSON;
import com.jie.reggie.commen.BaseContext;
import com.jie.reggie.commen.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
 * Created with IntelliJ IDEA.
 *
 * @Author: 曾豪杰
 * @Date: 2022/09/01/15:37
 * @Description:
 */
@Slf4j
@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
public class LoginCheckFilter implements Filter {

    //路径匹配器，支持通配符
    public static final AntPathMatcher PATH_MATCHER=new AntPathMatcher();
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request= (HttpServletRequest) servletRequest;
        HttpServletResponse response= (HttpServletResponse) servletResponse;
        //获取请求的url
        String requestURI = request.getRequestURI();
        log.info("拦截到请求{}",requestURI);
        //定义不需要处理的url
        String[] urls=new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/user/sendMsg",
                "/user/login"
        };
        //判断本次请求是否需要处理
        boolean check = check(urls, requestURI);
        //不需要处理，直接放行
        if(check){
            log.info("本次请求不需要处理{}",requestURI);
            filterChain.doFilter(request,response);
            return;
        }
        //4-1判断登录状态,登录放行
        if(request.getSession().getAttribute("employee")!=null){
            log.info("用户已登录{}",request.getSession().getAttribute("employee"));

            Long id= (Long) request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(id);
            filterChain.doFilter(request,response);
            return;
        }
        //4-2判断登录状态,登录放行
        if(request.getSession().getAttribute("user")!=null){
            log.info("用户已登录{}",request.getSession().getAttribute("user"));

            Long userid= (Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userid);
            filterChain.doFilter(request,response);
            return;
        }

        log.info("用户未登录");
        //如果未登录，返回未登录结果，通过输出流向客户端相应数据
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;

    }
    //匹配方法
    public boolean check(String[] urls,String requestURI){
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, requestURI);
            if(match){
                return true;
            }
        }
        return false;
    }}
